2012-02-12 Vienna II. (and XXII.) district - Danube river, Donaustadtbrcke (155 msm Quadrant 7764/4).Crows can't swim; they're resting on ice floes here, and even seem to have found some food there (or at least they were pecking away).Both C. corone (Carrion Crow) and Corvus cornix (Hooded Crow) are present here: the distribution line between both runs from north to south straight across Europe, separating central-western territory of the former from central-eastern territory of the latter, and Vienna is located exactly on this line (or, rather, a broader strip).You don't only find both species here but also all kinds of crossbreed - you can often see mixed couples of them, producing mixed offspring. As they're interbreeding more or less excessively (and successfully!) they've been subsumed under one species (Corvus corone) for some time, but it seems that currently they're again divided into two - possibly because they keep their gene pools separate for most of their territory, despite overlaps like you can see them here in Vienna. Here in this photo, for a change, you can see specimen of both species which seem to be of pure breed.See remarks about the ice jam here.
: Corvus dauuricus: Daurian Jackdaw Family: Corvidae (), Length: 32cm.,,The Daurian Jackdaw (Corvus dauuricus) is a member of the Corvidae or crow family of birds. It is closely related to the Eurasian Jackdaw. The name derives from the Dauria region of eastern Russia. It is the same size or perhaps slightly smaller (32 cm in length) than the latter species, with the same proportions and identical habits. The principal difference is its plumage; many but not all adults of this species have large areas of creamy white on the lower parts extending up around the neck as a thick collar. The head, throat, wings and tail are glossy black and the ear coverts are grizzled grey. Darker adults and young birds resemble Eurasian Jackdaws, though Daurian Jackdaws have a black iris, unlike the distinctive grey-white iris of the Eurasian Jackdaw.
Summary[edit] Description: English: Corvus Corvidae/Crow in Malaysia perching on TV Antenna. Date: 11 December 2012, 16:07:17. Source: Own work. Author: Tu7uh.
Description: Clark's Nutcracker Nucifraga columbiana, Mount Whitney, Sierra Nevada, California. Just about the only animal life we saw up there. Date: 11 March 2011, 06:54. Source: Camp robber. Author: Mitch Barrie from Costa Mesa, CA, USA.
Summary[edit] Description: English: The call of a Forest Raven (Corvus tasmanicus) recorded near Hobart in April 2013. Date: 21 April 2013, 12:13:28. Source: Own work. Author: FelixWilson.
Summary[edit] Description: English: Sri Lanka Blue Magpie (Urocissa ornata), taken at Sinharaja Forest Reserve, Sri Lanka. Date: 20 February 2010. Source: Own work. Author: Thimindu. Permission(Reusing this file): thimindu@gmail.com.